Relief valve or trap



Sept 16, 1930. s. D. CHADEAYNE RELIEF VALVE 0R TRAP Filed lay 15, 1929INVENTOR eafgaQC//ddedyng n.- al) Patented Sept. 16, 1930 UN1TED=STATESa Geenen n. GHADEAYNE; or BROOKLYN, ANEW Yom:

namen v anvn ,on TRAP.

Apparati@ 'niet' mayas, 1.929. seriaifmf 362,651.

My present invention relates to improvements in reliefA valvesor trapsfand may be considered as an ,-in'iprovem'eiitfin thel form of valveconstruction shown in my prior Pat- 5 ent No. 1,598,242, datedAugust 31,1926. In that patent I disclosed a form of valve in Y which athermostatic element was employed 'for actuating the valvefproper, thiselement having a non-positiveconnection with the o valve proper-suchthat the thermostatic element was operative to close the valve when hetbut inoperative tofclose same whencold, provision also -being made for aseparate spring element to openfthe valve whenthe pressure within thesystemwas substantially atmospheric.y It is the `'principal object otthe .present invention to arrange 'the elements of-s'aidpriorconstruction so as to provide tor a float actuated valvemember for the 20 purpose of preventing escape of water or otherliquidin the system to which my valve may be applied; and to provide aconstruction in which the thermostatioelement employed will be disposedso that it may func- -15 tion most eliiciently, i. e; by having properthermal contact with the steam or vapor while at the same time vbeingprotected against undue loss otheat by radiation and convection, thislatter vfeature being applicable to valves of other types. Other objectsand advantages of my invention will be apparent as the descriptionproceeds and the novel features will be pointed out in the appendedclaims.

cation Figure 1 is a view in central longitudinalY Figure 3 is a viewshowing a modification.V

Referring to the drawings by characters of reference, 10 denotes thebase of the valve 45 having portion 11 forming a conduit and having anexterior screw thread as shown, for attachment to a radiator or otherdevice.r The inside of the upstanding rim 13 of base 10 is threaded soas to receive an inner shell "50 14 constituting a float chamber. rBase10 In the drawings forming part of this speci-` `also basan upstandinglug orpin 16 receiving a stem 17 to which `a preferably openended float18 is attached by means of an axially disposed pin 1-9 secured theretoand 'depending within said float chamberand,

when the parts are assembled, within" the stemll 'f i i Shell 14terminates in an annular axially disposed threadedv portion 20 whichA isadapted "to receive a valve scat block 21. The lat- Vter has a boredpassage23, together with a sleeve portion 24 which depends into theshell14 and cooperates with passage 23 to form a valve seat. Bloclr2'1has an upwardy Y opening recessv 25 :forming a second` valve seat. Pin19 attaehedto float 18 has preferably a tapered end 27 which isadaptedjto seat partially within, the bore 23 thereby @to close Y saidbore when moved: upwardly against same as bythe presence of liquid inthefloat chamber." l Cooperating with valve seat is 'a second valve pin29"`=having'preferably a recessed or annular slottedportionBOwithinlwhich is Alakzlapted "to "engaged the' forked `end of: aspring '-31arranged so yas to compensate `for the weight otsuch stem. a i For thepurpose oztoperating the valve pin 29, athermostatic Yelernent isprovided wfhic'hin Vthe preferred e'mbodimentA is attached to theexterior ot'shell 14 `b'yineans oi rivets 34 and,A it desired,'bysolderas well, said member 33 extending upward over the valve member 29buthavingua non-positive connection therewith y as shown'. Also joined:to shell l14,. preferably4 with thether'- l mostaticjeleme'nt V33 isthefend of spring "31 asshown.l f i In order lto afford the"A properheating ,and cooling conditions for, therm'ostatic element 33` as wellas to protect .same ,against accidental Vdisturbance and from dust, an.outer shell 36 is provided which preferably tits over the rim lr'otbase10 and encloses` the valve parts and thermostatic yeleme'ntfas v shown.It may be secured to the baselljO in any suitable way, lasgby soldering.Shell 36 is provided with ya vent 3"? .and imparts to the valve a neatand attractiveV appearance. V In`,the 1,('iperation of my fdevice, Vairmay be vented tro'mithe systemv through the passage 23 and the vent hole37 both valves being open. Vhen, however, steam starts to flow throughthe valve, the thermostatic element 33 will be heated up and its actionWill be to close valve pin 29 upon its seat 25 and thus prevent furtheregress of steam. However; when the heating system is all-owed to cool ofand a vacuum produced therein, this vacuum will be held (assuming thesystem without substantial leakage) by the action of the valve pin 29remaining on its seat. lllien, however, for any reason the vacuum isdestroyed then the spring 31 will be effect ed to lift valve pin 29 awayfrom its seat and the valve will then be ready for venting air from thesystem when the steam is again being generated. At the same time shouldthe system ill with water as by leakage or by inadvertently omitting toturn off the supply of make-up water to the system, the valve pin 19will be urged upon its seat by the action of the float 18 and thusprevent egress of water thru the valve.

In Figure 3 I have illustrated a construction in which the non-positiveconnection of the thermostatic element 33a is replaced by a positivec-onnection therewith by virtue of a forlr33b in said element engaging arecess in the valve pin 29a, this construction corresponding to theordinary non-vacuum radiator air valve. Due, however, to the outer shell36a the efiiciency of operation of said valve will be increased.

It will be noted that in the forms of construction shown, thethermostatic elements 33 and 33 may be arranged to act as a safetydevice for the reason that beyond a certain temperature the pressure ofsteam, for eX- ample, within the system will be greater than the forceexerted by the thermostatic element in the direction to keep the valveshut. Accordingly, by suitably proportioning the size of thethermostatic element and that of the valve seat, my improved deviceVVmay be arranged to function as a safety valve for any temperature andpressure over a comparatively wide range.

I claim:

1. In a relief valve, a valve proper, a second valve controlled bytemperature, an inner shell constituting a float chamber, a floattherein, an outer heat insulating and protecting shell over said shelllirst mentioned, and a thermostatic element in the annular space betweensaid shells for controlling said temperature controlled valve, saidelement beingl attached to the exterior of said inner shell. L'

2. In a relief valve having a valve proper which is controlled by athermostatic element having a nonpositive c-onnection therewith suchthat said element when hot is operative to close said valve but isinoperative to open same when cold together with a spring elementattached to hold said valve open when the pressure oneither side of saidvalve is substantially equal, an inner shell constituting a ioatchamber, a float therein, an outer heat insulating and protecting shellover said inner shell and forming an annular space between it and saidinner shell, said thermostatic element being attached to the exterior ofsaid inner shell and being contained within said annular space.

3. In a relief valve of the type described, a shell constituting a floatchamber, a ioat in said chamber, a valve pin carried thereby, a secondvalve pin, a tlierm-ostatic element for actuating same, the latter beingattached to said shell and a valve block carried by said shell firstmentioned and having a passage therethrough, said block providing avalve seat for said float controlled valve and a seat for saidtemperature controlled valve.

4. In a relief valve having a valve proper which is controlled by athermostatic element having a non-positive connection therewith suchthat said element when hot is operative to close said valve but isinoperative to open same when cold, together with a spring elementadapted to open said valve when the pressure of either side thereof issubstantially equal, a shell constituting a float chamber, a iioattherein, said shell having attached to the exterior thereof saidthermostatic element and said spring element.

In testimony whereof I have affixed my signature to this specification,

GEO. D. CHADEAYNE.

